Use this body composition monitor and its Innerscan technology to assess the affect diet and exercise has on your body. This monitor will keep you on track and help you get to your goals. It measures monthly metabolic changes and helps you determine what impact they have on your exercise regimen and diet. You can input the cycle start date every month, and the unique traffic light indicator system will give you data during every phase so you can maximize your calorie burn and lower fatigue throughout the month on certain days.